Refresh generators on config reload

src/main/java/world/bentobox/caveblock/CaveBlock.java

@@ -80,6 +80,11 @@ public void onReload()
     {
         super.onReload();
         this.loadSettings();
+        // Refresh the generators so reloaded settings (world depth, materials, etc.)
+        // apply to newly generated chunks without a server restart.
+        this.chunkNormalGenerator.reload();
+        this.chunkNetherGenerator.reload();
+        this.chunkEndGenerator.reload();
     }
 
 

src/main/java/world/bentobox/caveblock/generators/ChunkGeneratorWorld.java

@@ -40,7 +40,7 @@ public class ChunkGeneratorWorld extends ChunkGenerator {
     // -------------------------------------------------------------------------
 
     private final CaveBlock addon;
-    private final Settings settings;
+    private Settings settings;
     private final World.Environment environment;
     private final List<BlockPopulator> blockPopulators;
 
@@ -65,9 +65,13 @@ public ChunkGeneratorWorld(CaveBlock addon, World.Environment environment) {
     // -------------------------------------------------------------------------
 
     /**
-     * Called when config is reloaded. Rebuilds block populators.
+     * Called when config is reloaded. Re-reads the live settings (a reload replaces
+     * the {@link Settings} instance) and rebuilds block populators so that changes
+     * such as world depth, roof/floor and main blocks take effect on newly
+     * generated chunks without a full server restart.
      */
     public void reload() {
+        this.settings = addon.getSettings();
         this.blockPopulators.clear();
         // Overworld uses vanilla decorations (shouldGenerateDecorations = true).
         // Nether and End use NewMaterialPopulator for ore/block placement.

src/test/java/world/bentobox/caveblock/CaveBlockTest.java

@@ -155,6 +155,8 @@ void testOnEnable() {
      */
     @Test
     void testOnReload() {
+        // onReload refreshes the generators, which are created in onLoad().
+        addon.onLoad();
         addon.onReload();
         File check = new File("addons/CaveBlock", "config.yml");
         assertTrue(check.exists());